An infusion port with high safety

Abstract

The present application discloses an infusion port with high safety, which relates to the technical field of infusion ports. The present application includes: a port body, on which a liquid inlet cavity is provided, and a catheter communicated with the liquid inlet cavity is installed on the port body; a sandwich layer is provided on the wall thickness of the catheter, and the sandwich layer divides the catheter into an inner tube and an outer tube, and a spiral skeleton is installed on the inner wall of the outer tube. When the present application is in use, the catheter is placed into the vein of a patient. During use, the basic shape of the catheter is restricted by the spiral skeleton, and a limiting ring is arranged in the sandwich layer. When the catheter is bent, the contact between the limiting rings prevents the entire catheter from being bent at too large an angle or forming a bend, enabling the device to infuse normally, reducing the possibility of the patient forming venous thrombosis, and increasing the safety of the device.

Description

Technical Field

[0001] This application relates to the technical field of infusion ports, and particularly to an infusion port with high safety. Background Art

[0002] An infusion port is a completely implantable closed infusion device, including a catheter part with its tip located in the superior vena cava and an injection port implanted subcutaneously, which is suitable for patients who need long-term infusion, such as chemotherapy patients, reducing the possibility of phlebitis caused by repeated punctures.

[0003] The tube body of the existing infusion port is inserted into the patient's vein through surgery. However, veins are mostly curved, so the catheter is also curved in the vein. During subsequent use, the patient's own activities can easily cause the catheter to be overly curved or bent in the blood vessel, making infusion difficult or impossible, and easily leading to the failure of the infusion port and further causing the patient to form venous thrombosis. Therefore, this application proposes an infusion port with high safety. Summary of the Invention

[0004] The purpose of this application is to provide an infusion port with high safety to solve the problems in the above background art.

[0005] To achieve the above purpose, this application specifically adopts the following technical solutions:

[0006] An infusion port with high safety, comprising:

[0007] A port body, on which a liquid inlet cavity is provided, and a catheter communicating with the liquid inlet cavity is installed on the port body;

[0008] A sandwich layer is provided on the wall thickness of the catheter. The sandwich layer divides the catheter into an inner tube and an outer tube. A spiral skeleton is installed on the inner wall of the outer tube, and the length of the spiral skeleton is the same as the length of the sandwich layer. A plurality of limiting rings are installed on the wall of the inner tube located in the sandwich layer, and the limiting rings are arranged in an array along the axis of the inner tube in advance.

[0009] Furthermore, a spiral groove is provided on the outer tube, and the spiral skeleton is installed in the spiral groove.

[0010] Furthermore, an inclined plate is installed in the liquid inlet cavity. The inclined plates are symmetrically installed on both sides of the inner wall of the liquid inlet cavity, and the distance between the inclined plates gradually decreases from the end close to the catheter to the end far from the catheter, so as to form a liquid inlet between the inclined plates. A blocking plate is slidably installed in the liquid inlet cavity, and the blocking plate is located on the side of the inclined plate far from the liquid inlet. A through plate is installed on the blocking plate, and the projection of the blocking plate on the inclined plate blocks the liquid inlet, and the projection of the through plate on the inclined plate is smaller than the diameter of the liquid inlet.

[0011] Furthermore, an expansion panel is installed at one end of the blocking plate away from the liquid inlet, and the area of the longitudinal section of the expansion panel toward the conduit is larger than the area of the longitudinal section of the blocking plate in the same direction.

[0012] Furthermore, a thickening block is installed at the connection between the port seat and the catheter, and the diameter of the thickening block is larger than the outer diameter of the catheter.

[0013] Furthermore, the inner wall of the conduit is provided with a plurality of extending grooves along its axial direction.

[0014] Furthermore, a pipeline cavity is provided in the liquid inlet cavity, the pipeline cavity is used to connect with the catheter, the inner diameter of the pipeline cavity is consistent with the inner diameter of the catheter, a deceleration ball is rotatably installed in the pipeline cavity, and the diameter of the deceleration ball is smaller than the diameter of the inner wall of the pipeline cavity.

[0015] Furthermore, the free end of the conduit is provided with a rounded corner.

[0016] The catheter adopts a three-level anti-bending design of sandwich, spiral skeleton, and restriction ring. The spiral skeleton made of medical plastic is embedded in the spiral groove of the outer tube to provide elastic support and prevent the catheter from collapsing.

[0017] Sandwich restriction ring: Multiple annular restriction rings are set on the outer wall of the inner tube, with a spacing of 1-2mm. The restriction rings conflict with each other during bending, limiting the bending angle to ≤45°;

[0018] Inner pipe extension groove: longitudinal extension grooves are set on the inner wall to reduce liquid residue and assist in flushing and cleaning;

[0019] The catheter is composed of three composite layers: an outer tube containing a spiral skeleton, an interlayer containing a restriction ring array, and an inner tube containing an extended surface groove.

[0020] An inclined plate, a blocking plate and an expansion plate are arranged in the liquid inlet cavity to link the valve, and the symmetrical inclined plates form a gradually shrinking liquid inlet; the blocking plate slides, and the medicine pushes the through plate to open, and the expansion plate is closed under pressure when blood flows back. The blocking plate is made of silicone material, and the area of the expansion plate is 1.5 times that of the blocking plate, which enhances the blood driving force.

[0021] The beneficial effects of this application are as follows:

[0022] When the present application is in use, the catheter is inserted into the patient's vein. When in use, the basic shape of the catheter is restricted by the spiral skeleton, and a restriction ring is provided in the interlayer. When the catheter is bent, the interference between the restriction rings prevents the bending angle of the entire catheter from being too large or forming a bend, so that the device can perform infusion normally, reduces the possibility of venous thrombosis in the patient, and increases the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0024] Figure 2 It is an exploded view of part of the structure of this application;

[0025] Figure 3 It is a schematic diagram of the structure between the inclined plate and the blocking plate of this application;

[0026] Figure 4 It is this application Figure 1 The three-dimensional sectional view of the structure in;

[0027] Figure 5 It is the three-dimensional sectional view of the port seat structure of this application;

[0028] Figure 6 It is the three-dimensional sectional view of the catheter structure of this application;

[0029] Reference numerals: 1, port seat; 101, liquid inlet chamber; 102, catheter; 1021, inner tube; 1022, outer tube; 2, interlayer; 201, spiral skeleton; 202, limiting ring; 3, spiral groove; 4, inclined plate; 5, liquid inlet; 6, blocking plate; 7, through plate; 8, expansion panel; 9, thickening block; 10, extension surface groove; 11, pipeline cavity; 12, deceleration ball. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Embodiment 1

[0031] As Figures 1-6 shown, a highly safe infusion port proposed in Embodiment 1 of this application includes:

[0032] A port seat 1, on which a liquid inlet chamber 101 is opened. A catheter 102 communicating with the liquid inlet chamber 101 is installed on the port seat 1. During use, the port seat 1 and the catheter 102 are placed into the patient's body through surgery. A rubber skin made of medical rubber is provided on the upper surface of the port seat 1. The infusion needle is punctured through the rubber skin into the liquid inlet chamber 101 for infusion, so that the function of the device is the same as that of the existing infusion port for delivering liquid medicine;

[0033] An interlayer 2 is opened on the wall thickness of the catheter 102. The interlayer 2 divides the catheter 102 into an inner tube 1021 and an outer tube 1022. A spiral skeleton 201 is installed on the inner wall of the interlayer 2 where the outer tube 1022 is located. The length of the spiral skeleton 201 is the same as the length of the interlayer 2. The spiral skeleton 201 is made of medical plastic and has a certain elasticity. During use, a spiral skeleton 201 is provided in the interlayer 2. Due to the elasticity of the spiral skeleton 201 itself, when the catheter 102 bends with the movement of the patient, the catheter 102 can be reset through the self-resetting of the spiral skeleton 201, reducing the possibility of the catheter 102 being bent;

[0034] A plurality of limiting rings 202 are installed on the tube wall of the inner tube 1021 located in the interlayer 2. The limiting rings 202 are first arranged in an array on the inner tube 1021 along the axial direction of the inner tube 1021. The distance between the diameters of the limiting rings 202 is relatively close. The distance between the limiting rings 202 enables the catheter 102 to bend. However, when the bending of the catheter 102 is too large, the parts of the limiting rings 202 close to each other as the catheter bends, so that the parts close to each other between the limiting rings 202 abut against each other, restricting the bending of the catheter 102, further reducing the possibility of the catheter 102 being bent or having too large a bending degree during use, and increasing the practicability of the device;

[0035] Compared with the prior art, during use, the catheter 102 is placed into the vein of a patient. During use, the basic shape of the catheter 102 is restricted by the spiral skeleton 201, and the limiting rings 202 are arranged in the interlayer 2. When the catheter 102 bends, the abutment between the limiting rings 202 prevents the entire catheter 102 from having too large a bending angle or forming a bend, enabling the device to infuse normally, reducing the possibility of the patient forming venous thrombosis, and increasing the safety of the device. Embodiment Two

[0036] As Figure 6 shown, Embodiment Two further discloses the outer tube 1022, the liquid inlet cavity 101, and the port seat 1 on the basis of Embodiment One. In Embodiment Two, spiral grooves 3 are formed on the outer tube 1022, and the spiral skeleton 201 is installed in the spiral grooves 3. The outer tube 1022 is connected to the spiral skeleton 201 through the spiral grooves 3. During use, the contact area between the outer tube 1022 and the spiral skeleton 201 is increased through the spiral grooves 3, so that when the spiral skeleton 201 deforms, it can drive the catheter 102 to reset more stably, increasing the practicability of the device.

[0037] As Figure 3 and Figure 5 shown, in Embodiment Two, a sloping plate 4 is installed in the liquid inlet cavity 101. The sloping plate 4 is symmetrically installed on both sides of the inner wall of the liquid inlet cavity 101. The distance between the sloping plates 4 gradually decreases from the end close to the catheter 102 to the end far from the catheter 102, so as to form a liquid inlet 5 between the sloping plates 4. The distance between the ends of the sloping plates 4 facing the catheter 102 is greater than that of the other end, so that the caliber of the liquid inlet 5 is smaller. The caliber of the liquid inlet cavity 101 on the side of the sloping plate 4 close to the liquid inlet 5 is the same as the diameter of the rubber skin on the port seat 1, which is not clearly shown in the accompanying drawings of the specification for the convenience of display. Through the above settings, when the infusion needle is inserted into the rubber skin, the input liquid is always located at the end of the sloping plate 4 facing the liquid inlet 5;

[0038] A blocking plate 6 is slidably installed in the liquid inlet chamber 101. The blocking plate 6 is located on the side of the inclined plate 4 away from the liquid inlet 5. A through plate 7 is installed on the blocking plate 6. The projection of the blocking plate 6 on the inclined plate 4 blocks the liquid inlet 5. The projection of the through plate 7 on the inclined plate 4 is smaller than the diameter of the liquid inlet 5. The sliding path of the blocking plate 6 is to approach or move away from the liquid inlet 5. When the blocking plate 6 is inserted into the liquid inlet 5, the liquid inlet 5 is blocked by the blocking plate 6. When the through plate 7 is located in the liquid inlet 5, there is a gap for the liquid medicine to pass between the through plate 7 and the liquid inlet 5;

[0039] A plate body is installed in the liquid inlet chamber 101. The plate body is installed on the side of the blocking plate 6 close to the conduit 102. When the liquid medicine pushes the blocking plate 6, the plate body limits the maximum sliding limit of the blocking plate 6, so that the blocking block 6 will not move too far away from the liquid inlet 5;

[0040] During use, when the infusion needle infuses liquid into the liquid inlet chamber 101, the liquid medicine pushes the through plate 7 to insert it into the liquid inlet 5. At this time, a gap appears between the liquid inlet 5 and the through plate 7, enabling the liquid medicine to be normally infused. During the infusion, since this device is mostly applicable to chemotherapy patients and chemotherapy drugs need to be slowly infused, it often takes half a day to finish the infusion. If the patient needs to go to the toilet or engage in other activities, it is easy for venous blood to flow back. At this time, the blood flow pushes the blocking plate 6, causing the blocking plate 6 to be pushed into the liquid inlet 5, thereby blocking the liquid inlet 5, reducing the possibility of blood flowing back into the infusion needle, and further reducing the possibility of the patient's panic, increasing the practicability and safety of the device.

[0041] As Figure 5 shown, in the second embodiment, an expansion panel 8 is installed at one end of the blocking plate 6 away from the liquid inlet 5. The area of the longitudinal section of the expansion panel 8 in the direction towards the conduit 102 is larger than the area of the longitudinal section of the blocking plate 6 in the same direction. The expansion panel 8 is used to increase the area of the blocking plate 6 in the direction towards the conduit 102. When blood flows back, it increases the contact area between the blood and the blocking plate 6, better pushing the blocking plate 6, enabling the blocking plate 6 to be better inserted into the liquid inlet 5, and increasing the practicability of the device.

[0042] As Figure 1 and Figure 5 shown, in the second embodiment, a thickening block 9 is installed at the connection between the port seat 1 and the conduit 102. The diameter of the thickening block 9 is larger than the outer diameter of the conduit 102. During use, the thickness of the connection between the conduit 102 and the port seat 1 is increased by the thickening block 9. When the conduit 102 moves, the side wall of the conduit 102 is resisted and blocked by the edge of the thickening block 9, preventing the connection between the conduit 102 and the port seat 1 from being bent, further increasing the smoothness of the conduit 102 and the safety of the device. Embodiment Three

[0043] AsFigures 1-6 As shown in the figure, Example 3 further discloses the present application on the basis of Example 2. In Example 3, a plurality of extended surface grooves 10 are provided along the axial direction of the inner wall of the catheter 102. By means of the extended surface grooves 10, the inner diameter of the catheter 102 is increased, and the possibility of the inner wall of the catheter 102 being blocked is reduced. Moreover, the extended surface grooves 10 are provided along the axial direction of the catheter 102, and their corners have openings in the outlet direction of the catheter 102. During use, through the flushing of the subsequent flushing saline, the residual liquid medicine located at the corners of the extended surface grooves 10 can be flushed, reducing the possibility of the liquid medicine remaining in the catheter 102.

[0044] As shown in Figure X, in some embodiments, a pipeline cavity 11 is provided in the liquid inlet cavity 101. The pipeline cavity 11 is used to connect with the catheter 102. The inner diameter of the pipeline cavity 11 is the same as that of the catheter 102. A deceleration ball 12 is rotatably installed in the pipeline cavity 11. The diameter of the deceleration ball 12 is smaller than the diameter of the inner wall of the pipeline cavity 11. During use, when the liquid medicine moves from the liquid inlet cavity 101 into the catheter 102, it passes through the pipeline cavity 11. The deceleration ball 12 blocks the liquid medicine, causing it to rotate under the erosion of the liquid medicine. While the liquid medicine can pass through the gap between the deceleration ball 12 and the pipeline cavity 11, the kinetic energy of the liquid medicine is converted into the mechanical energy of the deceleration ball 12, slowing down the flow rate of the overall liquid medicine and reducing the possibility of the patient's blood vessels being stimulated due to the too-fast speed of the liquid medicine, further increasing the safety of the device.

[0045] As shown in Figure X, in some embodiments, the free end of the catheter 102 is provided with a rounded corner. During the insertion process of the catheter 102, the rounded corner at its free end reduces the possibility of the catheter 102 irritating the inner wall of the blood vessel, increasing the safety of the device. Example 4

[0046] Combined with Figure 1 、 Figure 5 As shown in the figure, in the case of expansion for special scenarios, in view of the long-term indwelling needs of immunocompromised patients, a gradient antibacterial layer: micro-needle sustained-release structure is constructed on the outer surface of the port seat 1: a PLGA micro-needle array of 100 - 200 μm is provided on the outer layer of the port seat 1, and the needle body carries 0.5 mg / cm² of minocycline hydrochloride, which can reduce the incidence of catheter-related bloodstream infection (CRBSI) under the penetration of body fluids;

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An infusion port, characterized in that, Comprising: A base (1) with a liquid inlet cavity (101) formed thereon, and a conduit (102) communicating with the liquid inlet cavity (101) is installed on the base (1); A sandwich layer (2) is formed on the wall thickness of the conduit (102). The sandwich layer (2) divides the conduit (102) into an inner tube (1021) and an outer tube (1022). A spiral skeleton (201) is installed on the inner wall of the outer tube (1022), and the length of the spiral skeleton (201) is the same as that of the sandwich layer (2). A plurality of limiting rings (202) are installed on the tube wall of the inner tube (1021) located in the sandwich layer (2). The limiting rings (202) are linearly arrayed on the inner tube (1021) along the axial direction of the inner tube (1021). A spiral groove (3) is formed on the outer tube (1022), and the spiral skeleton (201) is installed in the spiral groove (3). An inclined plate (4) is installed in the liquid inlet cavity (101). The inclined plates (4) are symmetrically installed on both sides of the inner wall of the liquid inlet cavity (101). The distance between the inclined plates (4) gradually decreases from the end close to the conduit (102) to the end far from the conduit (102), so as to form a liquid inlet (5) between the inclined plates (4). A blocking plate (6) is slidably installed in the liquid inlet cavity (101). The blocking plate (6) is located on the side of the inclined plate (4) far from the liquid inlet (5). A through plate (7) is installed on the blocking plate (6). The projection of the blocking plate (6) on the inclined plate (4) blocks the liquid inlet (5), and the projection of the through plate (7) on the inclined plate (4) is smaller than the diameter of the liquid inlet (5); A plurality of extension surface grooves (10) are formed on the inner wall of the conduit (102) along its axial direction; The outer layer of the base (1) is provided with a PLGA microneedle array, and the needle body carries minocycline hydrochloride, which can reduce the incidence rate of catheter-related bloodstream infections under the penetration of body fluids.

2. The infusion port according to claim 1, wherein, An expansion panel (8) is installed at the end of the blocking plate (6) far from the liquid inlet (5). The area of the longitudinal section of the expansion panel (8) facing the conduit (102) is larger than the area of the longitudinal section of the blocking plate (6) in the same direction.

3. The infusion port according to claim 2, characterized in that, A thickening block (9) is installed at the connection between the base (1) and the conduit (102), and the diameter of the thickening block (9) is larger than the outer diameter of the conduit (102).

4. A port-a-cath according to claim 1, wherein A pipeline cavity (11) is formed in the liquid inlet cavity (101) for connecting with the conduit (102). The inner diameter of the pipeline cavity (11) is the same as the inner diameter of the conduit (102). A deceleration ball (12) is rotatably installed in the pipeline cavity (11), and the diameter of the deceleration ball (12) is smaller than the diameter of the inner wall of the pipeline cavity (11).

5. The infusion port according to claim 4, wherein, The free end of the conduit (102) is provided with a rounded corner.

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